Accrued reclamation and closure costs total.

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Amount of increase (decrease) in the asset retirement obligation before discounting the costs to present value from changes in the amount associated with the settlement of the obligation.

+ References

No definition available.

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Amount of reclamation liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

No definition available.

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Amount of assets related to reclamation insurance expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date

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No definition available.

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The inflation rate uses to valuing asset retirement obligations asset and liability.

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No definition available.

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- Definition

Debt to the entity for remediation at the site.

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No definition available.

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Percentage of ownership in properties.

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No definition available.

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- Definition

Payment consisting of proceeds from the exercise of warrants.

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No definition available.

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Risk free interest rate.

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No definition available.

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Amount of asset retirement obligations incurred during the period.

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Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of cash outflow reducing loss contingency liability.

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Amount of expenses incurred but not yet paid classified as other.

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-Publisher FASB
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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to investments, for example fixed assets. It excludes insurance settlements classified as operating cash flows.

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Note 4 - Environmental and Reclamation Activities (Details Textual) - USD ($) $ in Thousands		1 Months Ended				3 Months Ended			12 Months Ended
	Nov. 07, 2016	Aug. 31, 2016	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 15, 2015	Dec. 31, 2014	Aug. 31, 2014	Jul. 30, 2014	Dec. 31, 2013
Other Accrued Liabilities					$ 264,400
Payments for Legal Settlements			$ 15,000	$ 25,000	$ 168,000
Payment of Proceeds from Warrants Exercised													$ 41,300	$ 14,100
Accrued Reclamation and Closure Costs Total						$ 85,580			$ 85,580	$ 95,538		$ 57,250			$ 105,191
Asset Retirement Obligation, Revision of Estimate									2,760	4,112
Asset Retirement Obligation, Liabilities Incurred										$ 1,189
Minimum [Member]
Risk Free Interest Rate						6.00%			6.00%
Inflation Rate, Asset Retirement Obligation									2.00%
Maximum [Member]
Risk Free Interest Rate						14.50%			14.50%
Inflation Rate, Asset Retirement Obligation									3.25%
Nelson Tunnel/Commodore Site [Member] \| United States and Colorado [Member]
Loss Contingency Accrual, Payments		$ 6,000
Gilt Edge Mine Superfund Site [Member] \| United States and South Dakota [Member]
Loss Contingency Accrual, Payments	$ 3,900
Gilt Edge Mine Superfund Site [Member] \| United States, South Dakota, Insurers and Another Potentially Responsible Party [Member]
Loss Contingency Accrual, Payments	$ 6,400
Gilt Edge Site and Nelson Tunnel/Commodore Site [Member]
Liability for Remediation								$ 9,900
Lucky Friday [Member]
Risk Free Interest Rate						6.50%			6.50%
Asset Retirement Obligation, Revision of Estimate Before Discounting							$ 22,600
Asset Retirement Obligation, Revision of Estimate							3,300
San Sebastian [Member]
Asset Retirement Obligation, Revision of Estimate Before Discounting							4,300
Asset Retirement Obligation, Liabilities Incurred							4,500
Greens Creek [Member]
Asset Retirement Obligation, Revision of Estimate Before Discounting						$ 3,700
Asset Retirement Obligation, Revision of Estimate						$ (5,000)
Revett Mining Company, Inc. [Member]
Ownership Percentage											100.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Reclamation Liability								17,500			$ 17,513
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Reclamation Insurance Asset								$ 16,800			$ 16,800
Proceeds from Insurance Settlement, Investing Activities							$ 16,000
Revett Mining Company, Inc. [Member] \| Mining Properties and Mineral Rights [Member]
Ownership Percentage								100.00%